Effects of different site pressing on local myofascial trigger points in chronic pain model rats
Acupuncture Moxibustion and Tuina|更新时间:2023-08-07
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Effects of different site pressing on local myofascial trigger points in chronic pain model rats
Journal of Beijing University of Traditional Chinese MedicineVol. 46, Issue 7, Pages: 1008-1019(2023)
作者机构:
1.广西中医药大学针灸推拿学院 南宁 530001
2.湖南中医药大学针灸推拿与康复学院
作者简介:
A/Prof.LI Wu, Ph.D., Master’s Supervisor. College of Acupuncture & Tuina and Rehabilitation, Hunan University of Chinese Medicine, No.300, Xueshi Road, Yuelu District, Changsha 410208. E-mail: 272434694@qq.com
基金信息:
National Natural Science Foundation of China(81973975;82174526;82274676);Science and Technology Innovation Program of Hunan Province(2022RC1221)
JIANG Quanrui, LIU Dan, PAN Jieling, et al. Effects of different site pressing on local myofascial trigger points in chronic pain model rats[J]. Journal of beijing university of traditional chinese medicine, 2023, 46(7): 1008-1019.
DOI:
JIANG Quanrui, LIU Dan, PAN Jieling, et al. Effects of different site pressing on local myofascial trigger points in chronic pain model rats[J]. Journal of beijing university of traditional chinese medicine, 2023, 46(7): 1008-1019. DOI: 10.3969/j.issn.1006-2157.2023.07.020.
Effects of different site pressing on local myofascial trigger points in chronic pain model rats
We aimed to investigate the differences in the effects of local pressing
contralateral pressing
and distal pressing stimulation on the local myofascial trigger points (MTrPs) in chronic pain model rats.
Methods
2
SPF-grade male Sprague-Dawley rats were randomly divided into the blank group (
n
=10) and the MTrPs group(
n
=50) in which the MTrPs model was established. The MTrPs model was established in the left medial thigh muscle of rats by blunt strikes combined with centrifugal exercise. Rats that met the evaluation criteria after modeling were randomly divided into the model group
the local pressing group
the contralateral pressing group
and the distal pressing group(
n
=10). Rats in the blank group and the model group did not undergo intervention
and the remaining groups were treated with homemade pressing stimulators for 14 days. The rats in the local pressing group
the contralateral pressing group
and the distal pressing group were subjected to pressing stimulation at their respective sites. Specifically
they received pressing stimulation locally on the MTrPs
on the contralateral limb of the MTrPs site
and at the ipsilateral KI3 area of the MTrPs
respectively. The electromyogram (EMG) was recorded and soft tissue tension and the mechanical pain threshold were detected by electrophysiological instruments
a soft tissue tension tester
and a pressure painmeter
respectively. At the end of the intervention
tissues from the left medial thigh muscle or MTrPs were taken to observe the pathological morphology using HE staining. In addition
SP and CGRP contents were measured using immunohistochemistry and ELISA.
Results
2
Compared with the blank group
the model group had a lower mechanical pain threshold
higher soft tissue tension
obvious spontaneous electrical activity
significant pathological changes
and increased SP and CGRP levels (
P
<
0.05). Compared with the model group
the local pressing group
the contralateral pressing group
and the distal pressing group showed an increased mechanical pain threshold and decreased soft tissue tension
a lower spontaneous potential frequency amplitude
and lower SP and CGRP levels (
P
<
0.05)
with the local pressing group showing the greatest improvement (
P
<
0.05) and significant recovery on morphological analysis. The contralateral pressing group showed a better improvement in EMG
CGRP
and SP than the distal pressing group (
P
<
0.05).
Conclusion
2
Local pressing
contralateral limb pressing
and distal pressing at KI3 can relieve the pain of MTrPs
reduce soft tissue tension
and decrease spontaneous electrical activity
possibly by reducing the expression of SP and CGRP. Local pressing on MTrPs showed the best efficacy
followed by contralateral pressing and then distal pressing at KI3.
关键词
Keywords
references
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